Thank you so muchWelcome to iPhone Forums!
If it’s just the password of your Apple ID, it’s possible to reset it. There are a few ways:
Hope that helps.If you forgot your Apple Account password - Apple Support
Here's how to reset your Apple Account password and regain access to your account.support.apple.com
I have tried everything that has been suggested, but can’t seem to change my Apple ID or password. Feel like giving up. I’ve forgotten my password and change my phone number. But can’t seem to do anything with this phoneI’ve forgotten my Apple ID password, I’ve changed sims and phone number, bit don’t know how to create a new Apple ID without any of these details
Yes nothing works without my old phone numberIt‘s possible to ask for account recovery:
How to use account recovery when you can’t reset your Apple Account password - Apple Support (CA)
If you use two-factor authentication and can’t sign in or reset your password, you can regain access after an account recovery waiting period.support.apple.com